521216161006 has 16 divisors (see below), whose sum is σ = 788733716400. Its totient is φ = 258311040768.

The previous prime is 521216160947. The next prime is 521216161007. The reversal of 521216161006 is 600161612125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521216161007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1358851 + ... + 1699678.

It is an arithmetic number, because the mean of its divisors is an integer number (49295857275).

Almost surely, 2^521216161006 is an apocalyptic number.

521216161006 is a deficient number, since it is larger than the sum of its proper divisors (267517555394).

521216161006 is a wasteful number, since it uses less digits than its factorization.

521216161006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059283.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 521216161006 in words is "five hundred twenty-one billion, two hundred sixteen million, one hundred sixty-one thousand, six".